>Hi Cookers, we are trying to make a spiderman cake, we can't get the
>blue icing dark enough. we are using food colouring. Any suggestions.

Go to a cake decorating supply store and ask for royal blue paste coloring.
There's a liquid paste and a gel type paste. The gel type is more intense and
is used if you're trying to color a large amount (several pounds) of icing.
The liquid paste is used if you only want to color a small amount of icing.